And im sure that when they work 30 hours they are cutting 30 minutes off of their lunch break and spending less time in the bathroom and on reddit.
[1] https://www.politifact.com/truth-o-meter/statements/2015/sep...
However, this is one of the things I ask about when I'm interviewing for a position -- if the company keeps track of hours rather than paying for work product, then it's not likely to be a good fit for me. So, my experience is not random chance and may not be representative of the industry as a whole.